Sectional die for producing differential sheet-metal cams



T. M. RUSSELL.

- Feb. 13, 1923.

SECTIONAL DIE FOR PRODUCING DlFFERENTIAL SHEET METAL CAMS.

FILED DEC. 29, 1921 Feb. 13, 1923. 1,445,358.

T. M. RUSS SECTIONAL DlE FOR PRODUCING DIFF SHEET METAL s.

FILED DEC 29, HEETSSHEET Z THOI/ZAQ IMACDONOUG-H RUSSELL, 0F MIDDLETOWN, CONNECTICUT, ASSIGEE'OR TO CECTIONAL DIE FOR PRODUCINGDIFFERENTIAL SIiEET-DEETAL CAMS.

Application To 0. K iii/loam it may concern.

lie it known that I, THOMAS m, citizen of the llnited siding atliliddletowin in the county or" Middlesex and State of (Yinnecticut,have invented a new and n. ul Improvement ion'al Dies ior ProducirDifferential SheetQh lctal Cams; and I do i ehy declare the following,when taken in cminection with the accompanying drawings and thecharacters of reference marked thereon, to be a :i'ull, clear, and exactdescription same, and which said drawings cons part of this application,ant represent, in- Fig. 1 a face view oia sheet-metal shed ding-camembodying my invention.

Fig. 2 a sectional view onthe line 2 of Figure 1. Fig. 3 a sectionalview of compleniientary upper and lower sectional-dies constructed inaccordance with my invention, these'dies being shown with a sheet-metalcam between them.

Fig. at a face view of the upper die as completed. y

Fig. 5 a perspective view of ahigh-dwell die-segment.

Fig. 6 a similar view of a drop die-segment.

Fig. 7 a similar View of a low-dwell dieg segment.

Fig. 8 a similar View of ment.

ll ly invention relates to an improvement in sectional dies designed forthe production, without change, other than the re-combination of theirmovable segments, ()1 l a variety of sl'ieet-metal cams ditlin eutiatedin the coniormatiou of their tracks, and primarily designed i'or use inthe manufacture of sheddingcams :ior looms, the object being to providemeans for producing a variety of sheet-metal cams without the expense ofcutting andmaintaining special solid dies for each i l/Vith these endsin view, my invention consistsin a sectional ca1u die characterized by ahead and a plurality of segmental dicsections adapted to be mountedthereupon around a common center in a variety oi arrangements conformingto the requirements of the work to be done by the finished cam andhaving edge-to-edge tare-coring uration.

My invention further consists in a secfilcd December 2'9, 1921. SerialNo. 525,658.

ing

a rise die-seg- 1 complementary segmental die-sections havingedge-to-edge face-configuration and ca pable oi a considerable range 01:correspond 18, a drop segment 19, a rise segment 20,

and a drop segment 21,-this nomenclature having been adopted as to therise and drop segments on the assumption that the cam to be produced-1sa right-handed cam.

But this nomenclature would be reversed as to the rise and drop segmentsif itbe as; sumed that the sheet-metal cam to be produced is to berotated in a left-hand direction. The several segments listed aresccured by machine-sore\vs to the head ll around a common center. Thesectional-die thus producedis used in conjunction with a correspondingcomplemei tary sectional-die consisting of: the head 12 upon whichtwelve compleiiientarysegmental die-segments 223 are arranged in thesame manner, and similarly secured in place by machine-screws Thesegments 13 to 21 inclusive of the diehead 11 are formed withface-configurations consisting of grooves intersecting their edges,while the segments 23 of the die-head 12 are formed withface-configurations consisting of ribs extending between the edges ofthe segments "and registering with the grooves of the correspondingsegments of the upper die-head.

I have not shown the full oi segments necessary to the lower die, but itwill he re-combination upon their die-heads 11 and 12, accordlng to thenature of the ill) understood that they correspond in form andarrangement to the twelve segments shown and described as characteristicof the upper die, tov which. the lower die must be complementary, as inthe e se of ordinary solid dies.

The two dies havin been nrod-nced in a c: l.

I the manner described, are used in the mannor of solid dies for theproduction of sheet metal cams of the character oi the sliec"- metalshedding-cam 10.

it will be readily understood by any one tainiliar'with the art ofweaving. that in the operation oil? a loom, the shedding]; of the\varpthreads is controlled by-a sheddingcain, the track of which isplotted according to the desired shedding of the threads. whichdetermines the character oi the Weave. To change the shedding! torchanging the weave, the track oi? the sheddingcalrn nziust be plottedaccordingly. The plot ot'any given;shedding-cam having beenpredetermined by the character ot the weave to he produced, itwi'll beseen that under my invention the die-segments may be re-combi'ned uponthe die-heads, so as to produce the specific rises and dwells requisiteto effectthe shedding oi: the warpthreads necessary to produce thedesired weave. Thediesegments having been thus rei-conlbined, 1n thesame way as to both the upper and lower dies, the dies are used intferent weaves in the same manner that types, reln'esenting ditl'erentletters, are recombined for planting: different words.

lVhile l have described my improved die. with part cular relierence tothe )l()(lll,(5tl()l'l' ofshedding-cams for use in looms, my in,-ventlon isfobvlously not so lllllltetl, since it may be used in theproduction of sheet metal cams for whatever purpose available,

if it is desired to change their tracks with out producing a new die foreach new earn. It is equally obvious that the number 0t 'die-se 'inentsem bed will be varied in accordance with the. character of the machinein. which the sheet-metal cams are to be used. Thus, some looms call forcams of six, eight, ten, twelve, and sometinies even sixteen stations.My improved sectional dies will be constructed. accordingly. Thus, thedie shown is a die designed forthe construction of twelve-station cares,but obviously the principle would remain unchanged it the die wereconstructed for the production of cams having any other number oistations. By my invention, 1' am enabled to produce a wide range ofsheet-1netal cams with a sectional die consisting o l a head and, tocontinue the simile, a font of diesegnients.

I claim:

1. A sectional die for the production of sheet-metal cams ofdifferential track-conformation, the said die consisting of a dieheadand a font of segmental, die-sections adapted to be mounted thereuponaround a common center in a variety of re-combinations, according to thespecific traclcconformation of the cam to. be produced, the respectivesections having edge-to-edge face-configuration 2. A pair of sectionaldies for the production of sheet-metal cams of differentialtrack-conformation, one die consisting of" a die-head and a font ofsegmentaldie-sections adapted to be mounted upon it around a commoncenter in a. variety of re-combi'nations according to the specifictrack-eont'on mation ofthe cam to be produced, and the.

other die consisting of a die-head. and a font of segmental die-sectionsadapted to be mounted upon it around awcominon center in a variety ofre-combinations, accorr' to the tspecific conformation of the cam to beproduced, the respective segmental sections of the two dies having,registering; edge-toedge facQ-confi uratikm. I

In testimony whereol', l have signed this specification in the presenceof two subscribing witnesses.

THOMAS MACDONOUGH RUSSillili.

